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-rw-r--r--arch/um/drivers/line.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 8035145f043b..62087028a9ce 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -632,6 +632,7 @@ static irqreturn_t winch_interrupt(int irq, void *data)
int fd = winch->fd;
int err;
char c;
+ struct pid *pgrp;
if (fd != -1) {
err = generic_read(fd, &c, NULL);
@@ -657,7 +658,10 @@ static irqreturn_t winch_interrupt(int irq, void *data)
if (line != NULL) {
chan_window_size(line, &tty->winsize.ws_row,
&tty->winsize.ws_col);
- kill_pgrp(tty->pgrp, SIGWINCH, 1);
+ pgrp = tty_get_pgrp(tty);
+ if (pgrp)
+ kill_pgrp(pgrp, SIGWINCH, 1);
+ put_pid(pgrp);
}
tty_kref_put(tty);
}